What do the Help error codes mean on the XMT 304 display?

The XMT 304 displays numbered Help codes to indicate specific faults. Help 1 indicates a malfunction in the primary power circuit, Help 3 and Help 5 indicate overheating on the left and right sides respectively (unit will resume when cooled), Help 6 means input voltage is too low, and Help 7 means input voltage is too high. Help 2, 4, and 8 indicate thermal protection or secondary power circuit malfunctions requiring a Factory Authorized Service Agent. (Page 25)